Why diuretics contraindicated in sever renal failure?

Answer 1

ALL diuretics are renal poisons, (some worse than others, I admit) and in failure your kidneys are already in enough trouble.

from Japonesitaloca:

I disagree. Way too general of a statement.

Diuretics: actually diuretics are commonly used in chronic renal failure and are effective. High doses of furosemide (LASIX) are
often given with good results (doses have to be high cuz renal failure makes the kidneys less responsive to it)...if effects are
insufficient with LASIX, we often give another thiazide type diuretic metolazone (ZAROXYLYN) 30 min. before the lasix to
increase the effects--the 2 drugs together are a lot more effective.

In acute renal failure, it has been shown the diuretics have had negative effects (increased mortality, non-recovery of kidneys, increased hospital days)-but the attraction in diuretics in ARF lies in the excretion of sodium and water

Answer 2

The purpose of diuretics is to eliminate excess water from your body. This causes the kidneys to work overtime to get rid of the fluid which can weaken them.